Part of the light incident on any surface is reflected in a rough approximation of an image-forming state. The remainder of the light penetrates the surface and, after suffering absorption, scattering and multiple reflections beneath the surface, is re-emitted in a nearly diffuse state. In our everyday judgement of color, we customarily view an object from several angles and also perceive how glossy it is.

A DOI name can be used to identify any resource involved in an intellectual property transaction. Intellectual property includes both physical and digital manifestations, performances and abstract works. An entity can be identified at any arbitrary level of granularity. DOI names can be used to identify, for example, text, audio, images, software, etc; and in future could be used to identify the agreements and parties involved.

A DOI name prefix (for example, 10.1000/) enables a registrant to assign many DOI names, by building on the prefix to construct a range of unique identifiers (10.1000/abc, etc). To obtain a prefix, you need to work either with a Registration Agency or, for experimental or prototype purposes, with the International DOI Foundation. Working with a Registration Agency (RA) brings with it the advantages of participation in a defined DOI System application with others.

A defined result from a defined action i.e., do X and the result will be Y. DOI System services perform specific functions when presented with data from Application Profiles. Services exchange data, share tasks, and automate processes over the Internet by using the information associated with a DOI name. The term was coined in analogy to "Web services": for DOI System applications on the Web, DOI System services would be Web Services.

The Digital Opportunity Index (DOI) is a composite index that measures "digital opportunity", or the possibility for the citizens of a particular country to benefit from access to information that is "universal, ubiquitous, equitable and affordable" (WSIS Tunis Commitment, para 10). As such, it is a measure of each countries' performance and prospects for progress in building an Information Society.

Make sure not to graduate too quickly from a 180 file to the white block. Try using the white block buffer a little longer than seems necessary. Be sure to wipe all grit and dust from the nail and the 3-way buffer, as even the smallest amount of dust will prevent a high gloss. Cuticle oil may be helpful. There may be a slight color variation from batch to batch. Allow the polish to dry completely before you decide it doesn't match.

Members of the DOI Foundation are organizations (not usually individuals). Membership requires payment of an annual subscription, which varies by category of membership. The International DOI Foundation is similar in some ways to other development organisations such as the World Wide Web consortium. For more on this topic, see the DOI Handbook chapter The International DOI Foundation, in particular Section 7.13, Membership of the International DOI Foundation.

The IDF governs the DOI System, to ensure that all applications follow common rules. The system itself has several components: the technology is based on open agreed standards, while the infrastructure is defined by agreements between the various organisations which run the system, such as the Registration Agencies and the technology providers. Each Registration Agency is autonomous and the IDF has no role in determining an RAs business model or governance.

The DOI name syntax is a NISO standard, but allows the incorporation of any form of existing identifier. The DOI name suffix can be any alphanumeric string that the Registrant chooses. This can simply be a sequential number, or it can make use of an existing (legacy) identifier. The latter may often be administratively convenient for the Registrant. A check digit is not compulsory or necessary, but may be included.

The International DOI Foundation is a member of some standards organizations, and maintains a number of liaisons or alliances through memberships and/or exchange of information with others, which allow us to act as a collaborative interface in discussions on standards and infrastructure development across the spectrum of intellectual property and technology communities.

The DOI System is an application of the Handle System (a resolution system) to intellectual property. It is more than the Handle System: it adds to the Handle System an approach based on structured associated metadata, policies, procedures, business models and application tools. Initial implementations are now being supplemented by increasingly sophisticated value-added tools for metadata management and content management, which will use the Handle System multiple resolution function.

The DOI System is an implementation of the indecs metadata framework. In addition, IDF participates in the management and governance of the indecs framework, together with other stakeholders. IDF is one of the organisations which developed the original indecs framework and is now developing it further. The indecs approach is fundamental to the DOI System's design.

Options include: working with a Registration Agency and obtaining a DOI name prefix and assigning DOI names on an experimental basis; joining an IDF working group to work with others in a defined problem area; or joining the IDF as a full member, with rights to participate in all working groups. For more on this topic, see the DOI Handbook chapters The International DOI Foundation and Registration Agencies.

Yes. Fundamental to rights transactions are the concepts of unique identification and appropriate structured metadata. DOI System implements the indecs approach, which has at its heart the concept of rights management. IDF has introduced the concepts of the DOI System and indecs into many digital rights management activities such as MPEG-21, OEBF, TV-Anytime, etc.

Applications can range from DOI names being a persistent redirection to a single URL (which is easily accomplished) to advanced applications and services. Multiple resolution and defined metadata related through the DOI System data model ensure interoperability; the starting point for such advanced applications is the registration of a set of metadata appropriate to the particular community use being conceived.

Applications using DOI names can be constructed on a web site with full functionality behind the scenes. For some applications, this may require additional functionality such as that supplied in the Handle System. DOI names are URIs (URNs) not URLs: they are names, not locations. Most web browsers support locations (URLs) but have limited functionality for names, though this is expected to improve substantially in the near future. However, DOI names are useable with browsers immediately.

The DOI System makes use of XML (eXtensible Markup Language), and XML is entirely compatible with DOI names. The expression of metadata in XML is recommended both for kernel metadata and for DOI Application Profile metadata extended from the kernel. The indecs data dictionary and the DOI® Resource Metadata declaration both allow the use of XML expressions, commonly used for metadata transport and messaging. It seems likely that the relationship between DOI names and XML will grow over time.

The simplest DOI names (such as those in the earliest implementations of the DOI System) are essentially redirection from a persistent name (the DOI name) to a changeable URL. The information associated with the DOI name in the DOI System is therefore simply the URL and relevant administrative information for managing the DOI name. These are now known as DOI names of the Zero Application Profile.